THE SECURITY outside my neighborhood temple in Hyde Park, Chicago, like that around many Jewish institutions throughout the world these days, is conspicuous, though not as rigorous as at comparable buildings in Germany, France or Sweden. But in this case there is a special reason: Temple KAM Isaiah Israel stands just across the road from the residence of the Obama family. The house is rarely occupied now, but when the Obamas lived there full-time they used to “pal around” (to use Sarah Palin’s felicitous expression) with the congregation’s notoriously radical rabbi, the late Arnold Wolf.